Pouch for medical instruments and devices

ABSTRACT

A pouch is formed from one or more webs of material that provide at least one absorbent surface. The pouch further includes an integral flap, which may be folded over the opening, or entrance, of the pouch so as to maintain the contents of the pouch in place and to help retain moisture within the pouch. The interior of the pouch is defined, at least partially, by its absorbent faces.

FIELD OF THE INVENTION

This invention relates to pouches for holding medical instruments andmedical devices such as implants. These articles may be loaded into thepouch either as separate items or within holding trays or baskets.

BACKGROUND TO THE INVENTION

Traditionally, the purpose of a medical pouch has been to provide asterile barrier for instruments and devices up to the point of use.After use, the soiled articles are sent to a washing/disinfectingfacility in bags or containers which allow protein to dry on theinstruments, thereby rendering them difficult to clean.

Statements of the Invention

According to the present invention there is provided a pouch formed fromone or more webs of material providing at least one absorbent surface,the pouch having an integral flap which may be folded over the entranceof the pouch so as to maintain the contents of the pouch in place andhelp to retain moisture within the pouch, and the interior of the pouchbeing defined at least partly by the or each absorbent surface. In usetherefore, an item, such as a medical instrument will be located withinthe pouch along with the absorbent surface or surfaces.

A pouch in accordance with the present invention is intended to providea moist environment for the bag contents at and beyond the point of use.Such an environment reduces the drying of protein and other debris onthe instruments, thus facilitating easier cleaning prior tosterilisation.

To achieve and maintain a moist environment within the pouch, liquid isintroduced into the pouch and is allowed to permeate the absorbentsurfaces prior to use. The liquid may be a sterile liquid and/or it maycontain one or more additives. The liquid is preferably an aqueousliquid.

Preferably, the pouch comprises first and second substantiallyrectangular webs of material, at least one of which has an absorbentsurface on one side thereof, the webs being of the same length but ofdifferent width and being sealed together along respective three edgesof each web so that the web of greater width extends beyond the freeedge of the web of lesser width to provide a flap for folding over theweb of lesser width and also for facilitating ease of entry of theinstruments or trays into the pouch.

Alternatively, the pouch may comprise first and second substantiallyrectangular webs of material and a third web located between said firstand second webs and having at least one absorbent surface, the first andsecond webs being of the same length but of different width and beingsealed together along respective three edges of each web so that the webof greater width extends beyond the free edge of the web of lesser widthto provide a flap for folding over the web of lesser width and also forfacilitating ease of entry of the instruments or trays into the pouch.

Preferably, the pouch is formed by at least one web of absorbentmaterial.

Preferably, the pouch is provided with at least one web of waterimperious plastics film.

One or both of the flaps and the outer surface of the web of lesserwidth is provided with means for securing the flap to the outer surfaceof the web of lesser width. Preferably, such securing means is providedon the flap.

Preferably, the securing means is double sided tape.

The first and second webs may be provided by a single piece of foldedover material or alternatively by separate pieces of material.

Preferably, the webs are additionally joined together at one or morepositions along the length of the pouch to provide pockets foraccommodating medical instruments.

For example, the webs may be joined together at two positions along thelength of the pouch to provide three pockets.

The present invention also provides a method of storing a medicalinstrument or component in a moist environment, the method comprisinglocating the instrument or component within a pouch as claimed in any ofthe preceding claims, the or each absorbent surface being permeated withliquid.

The pouch may be provided in “wet” condition, that is to say, with theor each absorbent surface permeated with liquid. Alternatively, it maybe in “dry” form with liquid supplied in a separate container, fromwhich it is added to the pouch. As a further alternative, the pouch maybe supplied dry and the user may make up a suitable liquid for additionto the pouch.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are as follows:

FIG. 1 is a perspective view of a medical pouch in accordance with thepresent invention; and

FIGS. 2 to 4 are, in each case, front and longitudinal sectional viewsof three further embodiments of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

The present invention will now be described, by way of examples only,with reference to the accompanying drawings.

Referring to FIG. 1 of the accompanying drawings, a medical pouch 1 isfor use in holding surgical instruments in a moist environment bothduring and after use.

Pouch 1 includes a web of material 3 which may consist of two separatepieces of material 5, 7 or a single piece of material folded at 9. Thesurface or surfaces which provide the inner surfaces of the pouch areliquid absorbent.

As shown in the drawing, the webs 5 and 7 are rectangular and of thesame length but of different width. They are connected together at 9 (orfolded about 9) and also along edges 11 and 13. Because of the differentwidths, web 7 extends beyond the edge 15 of web 5 to form a flap 17which extends from the open edge of the pouch. Flap 17 may be providedwith a strip of double sided tape 19 which extends along the length ofthe flap at a position close to its free edge.

Pouch 1 may be divided into sealed compartments by means of seals 21which extend parallel to edges 11 and 13. As a result there are providedthree compartments for holding instruments 23.

With instruments in place in the pouch, the release liner may be removedfrom tape 19 and the flap folded over to retain the instruments withinthe pouch, and also to help retain the moist atmosphere within thepouch. When access to the instruments is required, the flap can beeasily detached from the body of the pouch.

The above described pouch allows instruments to be maintained in a moistenvironment both during and after use. Material, such as protein,adhering to the instruments may be kept moist thereby allowing for easycleaning prior to sterilisation of the instruments.

Sterile liquid may be introduced into the pouch to achieve and maintaina moist environment.

It should be appreciated that the above described pouch can be modifiedin many ways within the scope of the present invention. For instance,the webs may be of equal length, tape to hold the flap down may beomitted and the pouch may be made of three (or more) webs.

Various pouches, within the scope of the present invention, areillustrated in FIGS. 2 to 4. In each case, the pouch makes use of atleast one web of absorbent material 25. This web may be, for instance,of 100% viscose material, made of viscose rayon and binder (73% viscoserayon fibre/27% binder). The material may be impregnated with anabsorbency increasing agent. The material has low linting, that is tosay, it has a low level of loose fibres and does not disintegrate easilyas a result of instrument abrasion.

Referring to FIG. 2, a pouch 27 comprises a layer of absorbent material25 having a backing of a transparent plastics film 29. A shorter layerof plastics film 31 is provided at the front of absorbent layer 25. Thethree layers are secured together by sealing about a substantial portionof the edges as indicated at 33. The absorbent layer 25 is shorter thanboth plastics film layers 29 and 31.

The plastics film 31 may be made of any suitable transparent,translucent or opaque material. Examples are a polyester/polypropyleneor polyester/polyethylene film which might be a laminate, or anon-laminate. A film containing polypropylene might be used if the pouchand its contents are to be subjected to a steam sterilisation process. Afilm containing polyethylene might be used where the pouch and itscontents are to be subjected to EB (electron beam radiation) or γradiation.

The film 31 may or may not be provided with small holes to allow steamto escape from the pouch.

The flap 37, which is that portion of webs 29 extending above web 31,may be folded over the front of web 31 when the pouch is loaded with aninstrument. Flap 37 is provided with a strip 39 of double sided adhesivetape.

Referring to FIG. 3 of the accompanying drawings, a pouch 41 is formedfrom two webs of absorbent material 43 and 45. The webs are connectedtogether by means of seals indicated at 47. As a result, pockets areprovided at 49 and these pockets may accommodate surgical instruments orassociated components.

Rear web 45 extends beyond front web 43 and the flap 51 may be foldedover the web when the instruments are contained within the pouch.

Referring to FIG. 4 of the accompanying drawings, a further embodimentof a pouch in accordance with the present invention has a layer ofabsorbent material 53 backed by a layer of transparent plastics film 55.Located at the front of web 53 is a further layer of transparentplastics film 57 and the three layers are sealed together as indicatedby sealing 59. The result is that two pockets 61 are provided and thesecan accommodate instruments located between the plastics film 57 andabsorbent layer 53.

Fixed to plastics film 57, at a position above the sealing areas 59 is astrip of double sided adhesive tape 63. Tape 63 is provided with aprotective backing (on its front side) which may be peeled off. The flap65, above the upper edge of layer 57 may then be folded over the frontof layer 57 and secured to the adhesive layer 63 in order to maintainthe instruments within the pockets 61 of the pouch 57.

It should be appreciated that pouches may be made in variouscombinations of absorbent and non-absorbent layers. A plastics filmlocated on the front side of an absorbent layer provides visibility ofthe contents of the pockets and has some effect on water retention. If aplastic film is provided on both sides of the absorbent film, such as isthe case in the FIG. 2 embodiment, then there is both visibility ofinstruments within the pouch and also a better water retention.

Tests have been carried out on various embodiments as follows:

1. An embodiment in which there is no plastics film (such as is shown inFIG. 3). In this case, a time interval of about two hours elapsed beforethe water had completely evaporated from the moistened pouch.

2. Film is provided on both sides of an absorbent layer (such as isshown in FIG. 4). In this case, a period of two days elapsed before thewater has evaporated from the moistened pouch.

3. The pouch is similar to that of FIG. 4 except that the front plasticslayer is perforated to allow for steam sterilisation. In this case aperiod of four hours elapsed before water evaporated from the moistenedpouch.

1-13. (canceled)
 14. A pouch formed from one or more webs of materialproviding at least one absorbent surface and having an integral flapfoldable over an entrance of said pouch for maintaining contents of saidpouch in place and for retaining moisture within said pouch with saidpouch being defined, at least partly, by said at least one absorbentsurface.
 15. The pouch according to claim 14, wherein said one or morewebs of material includes a first substantially rectangular web ofmaterial and a second substantially rectangular web of material eachhaving an absorbent surface on at least one side thereof, said firstsubstantially rectangular web of material and said second substantiallyrectangular web of material being of a same length, but of differentwidths, and being joined together along three edge of each of said firstsubstantially rectangular web of material and said second substantiallyrectangular web of material, so that the substantially rectangular webof material of greater width extends beyond a free edge of said one ormore webs of lesser width for providing said integral flap.
 16. Thepouch according to claim 15, wherein said web is formed by at least oneweb of absorbent material.
 17. The pouch according to claim 16, furthercomprising at least one web of substantially water imperious plasticfilm.
 18. The pouch according to claim 15, wherein said integral flapincludes means for securing said integral flap to an outer surface ofsaid one or more webs of lesser width.
 19. The pouch according to claim18, wherein said means for securing said integral flap is double-sidetape.
 20. The pouch according to claim 15, wherein said firstsubstantially rectangular web of material and said second substantiallyrectangular web of material comprise a single piece of folded-overmaterial.
 21. The pouch according to claim 15, wherein said firstsubstantially rectangular web of material and said second substantiallyrectangular web of material comprise separate pieces of material. 22.The pouch according to claim 15, wherein said first substantiallyrectangular web of material and said second substantially rectangularweb of material are additionally joined together at one or morepositions along a length of said pouch for providing a plurality ofpockets.
 23. A method for storing a medical instrument in a moistenvironment, comprising the steps of: providing a pouch formed from oneor more webs of material providing at least one absorbent surface andhaving an integral flap foldable over an entrance of said pouch formaintaining contents of said pouch in place and for retaining moisturewithin said pouch with said pouch being defined, at least partly, bysaid at least one absorbent surface; permeating with liquid each said atleast one absorbent surface of said pouch; and, locating a medicalinstrument within said pouch.